Double your money - Is it possible?

Hi everyone. I've recently invested £200 into the market and I'm aiming to turn that into £400 by Christmas. My portfolio is up £22 in 5 days and I have racked up £2.90 in dividends already. Has anyone tried anything similar? I'll be updating regularly on my twitter https://www.twitter.com/KingsOfTipping, I know a lot of people have attempted this before, has anyone done this in such a short space of time with a similar budget?

@Gasdean I'm just frustrated I didn't start sooner. You only have to check the 1 year growth in every player in the Top 200, all of which have at least doubled in price. Anyone who invested £10k last year will have £20/30k now I presume.